/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
/*
* @filename :  field/datetime.h
**/

#ifndef _SERVER_FIELD_DATETIME_H
#define _SERVER_FIELD_DATETIME_H

#include <field/str.h>

class Field_datetime :public Field_str {
public:

  using Field::store;
  using Field::val_int;
  using Field::val_str;
  using Field::cmp;

  Field_datetime(unsigned char *ptr_arg, unsigned char *null_ptr_arg,
                 unsigned char null_bit_arg,
                 enum utype unireg_check_arg, const char *field_name_arg,
                 const CHARSET_INFO * const cs)
                 :Field_str(ptr_arg, 19, null_ptr_arg, null_bit_arg,
                 unireg_check_arg, field_name_arg, cs)
                   {}
  Field_datetime(bool maybe_null_arg, const char *field_name_arg,
                 const CHARSET_INFO * const cs)
                :Field_str((unsigned char*) 0,19,
                 maybe_null_arg ? (unsigned char*) "": 0,0,
                 NONE, field_name_arg, cs) {}

  inline enum_field_types type() const { return COLLAPSAR_TYPE_DATETIME;}
  inline enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONGLONG; }
  inline enum Item_result cmp_type () const { return INT_RESULT; }
  inline uint32_t decimals() const { return DATETIME_DEC; }
  int  store(const char *to,uint32_t length,const CHARSET_INFO * const charset);
  int  store(double nr);
  int  store(int64_t nr, bool unsigned_val);
  int  store_time(COLLAPSAR_TIME *ltime, enum enum_collapsar_timestamp_type type);
  inline int  reset(void)
  {
    ptr[0]=ptr[1]=ptr[2]=ptr[3]=ptr[4]=ptr[5]=ptr[6]=ptr[7]=0;
    return 0;
  }
  double val_real(void);

  int64_t val_int(void);

  String *val_str(String*,String *);

  int cmp(const unsigned char *,const unsigned char *);

  void sort_string(unsigned char *buff,uint32_t length);

  uint32_t pack_length() const       { return 8; }

  void sql_type(String &str) const;

  bool can_be_compared_as_int64_t() const { return true; }

  bool zero_pack() const             { return 1; }

  bool get_date(COLLAPSAR_TIME *ltime,uint32_t fuzzydate);

  bool get_time(COLLAPSAR_TIME *ltime);
};

#endif

